Coupled Superconducting and Magnetic Order in CeCoIn <sub>5</sub>

DOI Web Site 67 Citations
  • M. Kenzelmann
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • Th. Strässle
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • C. Niedermayer
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • M. Sigrist
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • B. Padmanabhan
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • M. Zolliker
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • A. D. Bianchi
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • R. Movshovich
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • E. D. Bauer
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • J. L. Sarrao
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
  • J. D. Thompson
    Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.

Description

<jats:p> Strong magnetic fluctuations can provide a coupling mechanism for electrons that leads to unconventional superconductivity. Magnetic order and superconductivity have been found to coexist in a number of magnetically mediated superconductors, but these order parameters generally compete. We report that close to the upper critical field, CeCoIn <jats:sub>5</jats:sub> adopts a multicomponent ground state that simultaneously carries cooperating magnetic and superconducting orders. Suppressing superconductivity in a first-order transition at the upper critical field leads to the simultaneous collapse of the magnetic order, showing that superconductivity is necessary for the magnetic order. A symmetry analysis of the coupling between the magnetic order and the superconducting gap function suggests a form of superconductivity that is associated with a nonvanishing momentum. </jats:p>

Journal

  • Science

    Science 321 (5896), 1652-1654, 2008-09-19

    American Association for the Advancement of Science (AAAS)

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